Number + 季
The measure word 季 (jì) is used to count seasons of a television show, sports league, or similar series. It functions similarly to the English word "season" and typically appears after a number or demonstrative, as in 新一季 (a new season).
这部剧的新一季终于要开播了。
Zhè bù jù de xīn yī jì zhōngyú yào kāibō le.
The new season of this show is finally about to premiere.
第三季的收视率比前两季都高。
Dì sān jì de shōushìlǜ bǐ qián liǎng jì dōu gāo.
The third season's ratings were higher than the first two seasons.
我还没看完上一季,别给我剧透。
Wǒ hái méi kàn wán shàng yī jì, bié gěi wǒ jùtòu.
I haven't finished watching the last season yet; don't spoil it for me.